-空隙-色中心:在添加钻石中的无处不在的可见和近红外II量子发射器
Brett C Johnson1, Mitchell O de Vries1, Alexander J Healey1
1School of Science, RMIT University, Melbourne VIC 3001, Australia.
ACS nano
|May 14, 2025
概括
钻石中的-空- (N2V) 颜色中心在NIR-II频谱中发射,从而实现了新的应用. 这种无处不在的缺陷存在于各种钻石类型中,包括用于细胞成像的纳米钻石.
科学领域:
- 钻石物理和量子光学.
- 材料科学在宽带差半导体中的缺陷.
背景情况:
- 钻石中的光发光缺陷,如空 (NV) 中心,对于量子技术至关重要,但通常仅限于可见/NIR-I波长.
- 这种光谱限制限制了它们在光子学,光纤通信和生物成像中的使用.
研究的目的:
- 研究钻石中-空- (N2V) 颜色中心,该中心在近红外II (NIR-II) 区域 (1000-1700 nm) 发射.
- 探索各种钻石类型中N2V中心的存在和特性及其潜在应用.
主要方法:
- 在不同的钻石样本 (散装,纳米颗粒,CVD,HPHT) 上进行光发光 (PL) 光谱.
- 分析N2V电荷状态 (N2V0和N2V-) 和它们的光谱特性.
- 量子光学建模和密度函数理论 (DFT) 的计算.
- 使用NIR-II PL.的皮肤细胞内引爆纳米钻石 (DNDs) 的成像.
主要成果:
- 在化钻石中,N2V中心无处不在,包括商业NV钻石传感芯片.
- N2V光发光强度与HPHT钻石中的替代度相关.
- 在N2V充电状态下,PL寿命为0.3ns.
- 爆炸纳米钻石表现出稳定的NIR-II PL,归因于N2V中心,使细胞成像成为可能.
结论:
- N2V中心是钻石中一个重要的,广泛的缺陷,具有有前途的NIR-II发射.
- N2V中心为先进的光子和生物成像应用提供了潜力,克服了可见/NIR-I发射器的局限性.
- 进一步研究N2V与其他钻石缺陷的相互作用是有必要的.
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